Formation of Supermassive Black Holes in the Center of Galaxies by Primordial Black Holes

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Khoushechin, Hassan | 2022

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 55474 (04)
University: Sharif University of Technology
Department: Physics
Advisor(s): Rahvar, Sohrab
Abstract:
One of the most important topics of interest to cosmologists and astrophysicists is the origin of supermassive black holes that form the center of most galaxies.In this research, we will introduce a mechanism for the growth of primordial black holes at the early universe, and we will argue that by this mechanism, with the assumptions that will be given in the relevant section, black holes of the order of 〖10〗^6 M_⊙ can be formed.Then assuming that there are supermassive black holes at the center of most galaxies, by calculating the number density of galaxies in comoving coordinate We will set the number density of galaxies in comoving coordinate and the number density of grown primordial black holes in comoving coordinates, equal and then we constraint on f_PBH which represents the ratio of the density of primordial black holes with the mass of the sun, to the density of dark matter particles. Our result for f_PBHwith mass M_⊙ is 〖〖10〗^(-7)
Keywords:
Galaxies Center ; Primordial Black Holes ; Cosmological Black Hole ; Supermassive Black Holes (SMBHs) ; Galaxy Formation